Lock.



Unrrnn STATES rrrcn WALTER EDWARD EMERY, OF WEST CHICAGO, ILLINOIS.

LOCK.`

SPECIFICATION forming part of Letters Patent No. 656,958, dated August28, 190D. Application filed January 15, 190. Serial No. 1,46 9. (Nomodel.)

To @ZZ whom it may concern:

Be it known that I, WALTER EDWARD EM- ERY, a citizen of the UnitedStates, and a resident of West Chicago, in the' county of Du Page andState of Illinois, have invented a new and Improved Lock, of which thefollowing is a full, clear, and exact description.

This invention relates to a lock which is especially adapted for use inconnection with switches to hold the switch-point secured, but which mayalso be used in various other connections, as will be obvious from thefollowing description.

This specification is the disclosure of one form of my invention,whilethe claims define the actual scope thereof.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the views.

Figure l is a view of the lock with parts in section, showing the lockin closed position. Fig. 2 is a similar view showing the lock released,but with the hasp in place. Fig. 3 is a similar view with the haspwithdrawn. Fig. 4 is a section on the line G 6 of Fig. 1. Fig. 5 is adetail perspective view of the chock-bar for the bolt. Fig. 6is aperspective viewof the bolt. Fig. '7 is a side elevation ot thehasp-bar. Fig. 8 is a detail perspective view of the tumbler, and Fig. 9is a similar View of the keeper.

The lock has a casing 18, suitably formed and arranged to carry thebolt, (see Fig. 6,) which comprises two locking-fingers 21 and 22, thelatter being beveled to be engaged by the inner end of the hasp-bar 20,so as to force the bolt backward 'as the hasp enters. The bolt alsocomprises a shank or body portion 23, from the inner end of whichextends a finger 24. to be engaged bya key for throwing the bolt. Thefinger 2l has a rearward extension 21 projecting from the opposite sideof the shank or body 23 for a purpose which will hereinafter appear. Thebolt is mounted in the casing 18 to move toward and from the hasp-bar20, as illustrated. Guideflanges 18a are formed in the casing 18, be:tween which flanges the bolt moves, and if desired a guide-plate 18b(see Fig. 4) may be fastened down on these flanges so as to lie Over thebolt. This guide-plate 18b has an upward extensionv 18, which engagesthe top of the casing to render the whole construction secure. Vhen theboltis in the position shown in Fig. 1, the ngers 2l and 22 are engagedin openings 25 in the hasp-bar, whereby the hasp-bar is held, and whenthe bolt is in the position shown in Fig. 2 the hasp-bar may bewithdrawn. l/Vhen the bolt is in the position shown in Fig. 3, thehasp-bar on entering the casing strikes the beveled finger 22 first andpushes the bolt back, so that the hasp-bar may move entirely into thecasing and the bolt subsequently return to engage the fingers2l and 22withthe walls: of the openings 25. A spring 2G is mounted in the casingand is engaged with the extension 2la 'of the finger 2l, such springtending to throw the bolt toward the hasp-bar', as shown.

A tumbler (see Fig. 8) works with the `bolt and is in the form of aplate 27, formed at one end with a lug 28 to be engaged by a spring 29,the spring serving to draw the tumbler to the right or toward thehasp-bar 20. The tumbler also has an elongated opening 29a adjacent tothe lug 28 and an essentially keyhole-shaped slot 30 in the opposite endportion. The elongated opening or slot 29 of the tumbler receives a piu3l, mounted rigidly in the casing, by which means the tumbler ismounted, the tumbler bearing on the bolt at the inner portion of theshank 23 and receiving in the slot`30 a stud 32, rigid on the bolt. Thestud 32 is adapted when the bolt is lin the position shown 'inu Fig. 1to lock in the enlarged portion or head of the slot 30, thus preventingthe movement of thc bolt. When, however, the tumbler is thrown to theright, as shown in Fig. 1, bythe action of the key, (indicated by thedotted lines in Figs. 1, 2, and 3,) the stud 32 will be thrown into linewith the main or narrow portion ofv the slot 30, thus permitting thebolt to be moved out of engagement with thehasp. VVlienthe tumbler isthrown by the key, the bolt may be withdrawn, and when the boltreturnsfto the position shown in Fig. 3 the tumbler will not be moved,and consequently the stud 32 does not engage with the walls of the slot30, but is left in line with the narrow part of the slot, so as topermit the bolt to be thrown back upon the entry of the hasp-bar intothe casing. Then the hasp-bar is moved into the IOO position shown inFigs-1 and 2, the bar will engage with the tumbler and throw the tumblerslightly to the left, thus causing the walls of the enlarged portion orhead of the slot in the tumbler to lock with the stud 32, the result ofwhich will be that the bolt will be secured and held so until thetumbler is again thrown by the key. For the purpose of permitting thenecessary movement of the tumbler I form in the end of the hasp-bar 2O atransverse groove A keeper-plate 34 (see Fig. 9) is mounted on top ofthe tumbler and is held by the pin 3l and by an addition al pin 35, asshown, such pins being riveted down on the keeper-plate to hold itrigid. A pin 36 is attached to the extension 2l"L of the finger 2l ofthe bolt, and on this pin 3G is pivotally mounted the chockbar 37, whichextends towardthe hasp-bar approximately in line with the finger 2l andits extension 2l?. A spring 38 is mounted in the casing 18 and bears onthe chock-bar, tending to throw it to the right, and the keeper-plate 34has an upturned extension or lug 3.9,which is adapted to be engaged bythe chock-bar 37 and which serves to limit the rightward movement of thebar. Vhen the lock is in closed position, the chock-bar 37 is engaged bythe inner end of the hasp and thrown to the position shown in Fig. l.When, however, the keyis engaged with the tumbler, throwing it torelease the bolt, and is subsequently engaged with the finger 24E of thebolt to throw the bolt, the chock-baris carried with the bolt, and thespring 38 throws the chock bar against the lug 39, the free end of thechockbar passing then into engagement with the hasp-bar 20, thus holdingthe bolt in open position against the tendency of the spring 26. Theparts remain in this position (see Fig. 2) until the hasp-bar 2O isdisengaged from the casing. Then the chock-bar 37 being deprived of itssupport, the spring 26 asserts itself and throws the bolt to theposition shown in Fig. 3, so that when the hasp-bar is again introducedinto the casing it will engage the bolt, as described, and automaticallythrow the bolt back, so that it may subsequently return to thelockedposition. (Shown in Fig; l.) The hasp-bar 2O has asquare upper corner2Ob to be engaged by the chockbar and a rounded corner 20 beneath thecorner 20b to engage the linger 22 of the bolt. (See Fig. 7.)

IIaving thus described my invention, I claim as new and desire to secureby Letters Patentl. In a lock, the combination with a casing, of a boltmounted therein, a tumbler working with the bolt, a keeper-platefastened over the tumbler and having a stud, a chock-bar pivotallymounted on the bolt and limited in its swinging movement by the stigd ofthe keeper-plate, and springs for actuating the mobile parts.

2. A lock having a bolt, a tumbler having connection with the bolt andadapted to be struck by the hasp, and a chock-bar pivoted on the boltand spring-pressed to engage the hasp, to hold the bolt in open positionat certain periods of the operation of the lock.

3. A lock, having a bolt, and a chock-bar pivoted on and moving with thebolt, the chock-bar serving to engage the hasp to hold the bolt openduring certain periods of the operation of the lock.

4. A lock, having a bolt adapted to be engaged and thrown by the key, atumbler serving to hold the bolt in closed position, the tumbler beingalso actuated by the key, and a chock-bar mounted on and carried by thebolt and serving to engage the hasp, to hold the bolt open duringcertain periods of the operation of the lock.

5. A lock, having a bolt adapted to be thrown bythe key, a tumblerserving to hold the bolt in closed position and also adapted to bethrown by the key to release the bolt, a chock-bar serving to hold thebolt in open position during certain periods of the operation of thelock, and a keeper-plate fastened adjacent to the chock-bar, to limitthe movement thereof.

6. A lock, having a bolt adapted to be cngaged by the key, to throw thebolt to open position, a tumbler serving to hold the bolt in closedposition, the tumbler being arranged in the path of the hasp, to bestruck thereby to release the bolt, and a chock-bar carried by the boltand adapted to engage the hasp to hold the bolt in open posit-ion duringcertain periods of the operation of the lock.

7. A lock, having a bolt, and a chock-bar mounted on and carried by thesaine, the chock-bar serving to engage the hasp to hold the bolt in openposition during certain periods of the operation of the lock.

8. A lock, having a bolt, a chock-bar pivotally mounted on and carriedby the boltand serving to engage the hasp to hold the bolt open duringcertain periods of the operation of the lock, and means for limiting themovement of the chock-bar to permit the movement of the hasp out ofengagement with the chock-bar.

In testimony whereof I have signed my naine to this specification in thepresence o two subscribing witnesses.

WALTER EDWARD EMERY.

Witnesses:

A. H. FAIRBANK, C. E. SMILEY.

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